wilkinson



March 10, 1964 l.. A. WILKINSON RANGE-FINDING GUN SIGHT 3 Sheets-Sheet 1Filed 0G12. 14, 1960 LEONARD A. W/LK/NSON 3 Sheets-Sheet 2 L. A.WILKINSON RANGE-FINDING GUN SIGHT March 10, 1964 Filed OCT.. 14, 196C)1N V EN TOR. LEONARD A VV/K/NSON A TTONE VS.

@06%, @Wyr nsw-| @H5N1 Mamh 10, 1964 1 A. WILKINSON 3,123,915

RANGE-FINDING GUN SIGHT IJG. I3 116.]4

qZOJIG- J5 JNVENTOR.

ATTONEVS.

United States Patent Oiitice 3,l23,9l Patented Mar. 10, 1964 3,123,915RANGE-FINDING GUT-J SIGI- Leonard A. Will-zinsen, Snyder, N.Y., assignerto American Optical Company, Southbridge, Mass. Filed Oct. 14, 195m,Ser. No.. 62,669 I9 Ciaims. itil. S33-Sil) This invention relates totelescopic rie sights and more particularly to an improved combinationrange finder and automatic sight reticle adjusting device.

Broadly stated, the invention provides a telescopic sight incorporatingan improved range finding mechanism of the type utilizing a fixed wireand a parallel movable wire, which when positionally adjusted to frame atarget object of known height automatically adjusts the elevation of thereticle so that when the reticle is centered on the target, trajectoryis compensated for. The operating principles of this type gun sight aredisclosed and explained in US. Patent 2,811,894, and the presentinvention provides new and improved operative mechanisms therefor, andin addition incorporates novel means for adjusting the mechanism to suitthe ballistic characteristics of the particular ammunition being used.

A primary object of the present invention is to provide a riile sight ofthe above described capabilities which is operable with improvedfacility.

Another object of the invention is to provide a sight as aforesaid whichincludes manual adjustment means to compensate for the differentballistic characteristics of different types of ammunition.

Still another object of the invention is to provide an improved riflesight as aforesaid which is of improved structural form so as to requireno protruding elements or housings or turrets or the like, outside acommon periphery.

Another object of the invention is to provide a range finding gun sightas aforesaid which is rugged and troublefree and which is not subject toinadvertent disturbances of the settings of the various adjustmentcomponents.

Other objects and advantages of the range finding sight of the inventionwill appear from the detailed description hereinbelow and from theaccompanying drawings wherein:

FIG. l is a fragmentary diagrammatic illustration of the use of a riflescope of the present invention;

FIG. 2 is a schematic representation showing the principle of operationof the adjustment mechanism of the present invention;

FIG. 3 is a representation of the view through the riiie scope of FIG.l;

FIG. 4 is a fragmentary horizontal sectional view on enlarged scalethrough the adjustment mechanism of a sight of the invention, takensubstantially along line IV-IV of FIG. 1;

FIG. 5 is a section taken along line V-V of FIG. 4;

FIG. 6 is a fragmentary View, partially in vertical section, of atelescope sight of the invention;

FIG. 7 is a View through the sight when adjusted as shown in FIG. 6;

FIG. 8 corresponds to FIG. 6 but shows the mechanism of the device ofthe invention in a different position of adjustment;

FIG. 9 is a View like FIG. 7, but corresponding to the adjustmentcondition shown in FIG. 8;

FIG. 10 corresponds to FIGS. 6 and 8 but shows the mechanism in stillanother position of adjustment;

FIG. l1 corresponds to FIGS. 7 and 9 but relates to FIG. 10;

FIG. 12 is a top plan view of a portion of FIG. 8, as indicated atXII--XII thereon;

FIG. 13 is a front end view, rotated 90 degrees of the device of FIG.12;

' arranged to pivot upon a movable fulcrum 34.

FIG. 14 is a sectional View taken along line XI--XI of FIG. 13;

FIG. 15 is an elevational view of the cam device disassociated from themechanism of FIG. 12.

The principle of operation of the range finding sight of the inventionis schematically shown in FIG. 2 of the drawing herewith. Asillustrated, the range finding and sight adjusting mechanism of theinvention employs a manually movable main cam as indicated at 20 (FIG.2) which is formed with two separate camming surfaces as indicated at22, 24. As shown herein the cam surface Z2 is provided to regulate theposition, within the rifle scope cylinder, of a horizontally disposedand vertically movable range hair or wire as indicated at 26. This wire26 is at all times disposed in generally parallel relation to ahorizontally disposed and positionally fixed range hair or wire 28; thewires 26, 2S being disposed in the telescope cylinder in such manner asto intercept the line of vision through the telescope towards the targetobject. As shown in FIG. 2, the cam surface Z2 regulates the motion ofthe movable wire 26 through means of an intermediate linkage comprisinga cam follower as indicated at 30 which actuates a lever 32; the movablewire 26 being carried by the opposite end of the lever 32. The lever 32is Motions of the cam surface 22 relative to the follower 3i) will causethe latter to be displaced and move the lever 32 to cause the movablewire 26 to move toward or away from the fixed wire 2S. In therangeiinding system being used the height of the target object isassumed to be a known quantity and this factor is fed into the systemthrough the medium of the movable fulcrum 34. The fulcrum point 34 ismounted upon the fixed structure of the device and is arranged to bepositionally adjustable by a suitable manually movable adjustmentdevice, whereby the gunner may adjust the position of the fulcrum 34longitudinally of the lever 32 to modify the rate of travel of themovable wire 26 responsive to adjustment of the cam 2h, in accord withhis estimate of the height of the target object. For example, if ahunter recognizes the target to be of a certain approximate height, sayfor example two feet, he will then set the manual adjustment device toits calibrated 24 inch position which will thereby move the fulcrum 34to an appropriate position transversely of the lever 32, so that thelinkage system will be adjusted to cause the range wires 26, 28 to berelatively positioned so that when the range wires are adjusted to framethe target the adjustments in the rest of the system will reflect arange which is accurate in close proportion to the accuracy of theestimate of target height. Incidentally, rthe mechanism may include asuitably calibrated scale which will be simultaneously moved inconjunction with positional adjustments of the movable wire 26 so thatthe range to the target s0 estimated may be read from the scale. It is aparticular feature of the mechanism herein that coincident withdetermination of the target range, the aiming reticle of the sight,which is indicated at 36 is simultaneously positionallyadjustedautomatically within the view through the rie scope, in such manner asto be at all times positionally regulated vertically to compensate forthe range distance. In other words, when the gunner adjusts in the rangending cam (having previously adjusted the object-height fulcrum control)he need not read the estimated range scale but simply uses the aimingreticle 36 as a direct sight on the target. The range distance isautomatically compensated for by supporting the aiming reticle upon apedestal 38 or other suitable support which is automatically displacedpositionally in response to movement of the cam surface of the camdevice 2r@ whenever the latter is manually adjusted. The slopes of thecam surfaces and the dimensions and relative arrangements of the linkagemech- 3 anisms are arranged as such that whenever the gunner displacesthe cam device 26 to frame the target object, the aiming reticle isautomatically appropriately displaced vertically to the correctelevational adjustment so that the gun barrel will be suitably elevatedwhile the reticle is dead on the target object.

Further, in accord with the present invention provision is made formodifying the profile of the surface 24 of the cam device to provide forcompensation for different ballistic characteristics of different kindsof ammunition as effect trajectory. In the case of the present inventionthis is accomplished by inclusion of means for moving the cam surface 24to change the rate and degree of travel of the reticle 36 responsive tomovement of the cam Ztl. As shown in FIG. 2, this effect is obtained bypivotally bending the cam surface 24 at a reduced section of arm portion4t). An eccentric cam device as indicated at 42 is arranged to bearagainst the section 46 so as to flex it, relative to the main body Ztlin such manner as to change the position of the cam surface 24 asindicated in FIG. 2. The cam 42 is arranged to be manually adjustablefrom externally of the device to be pre-set in accord with the type ofammunition being used, thus accomplishing modiiication of the action ofthe sighting device to suit the trajectory of the particular ammunitionin use.

As illustrated in FIGS. 4-15 of the drawing herewith, a preferredversion of the invention may be embodied in a telescopic rifle sightcomprising (FIG. 1) a basically tubular housing 44 mounting at one endthe objective lens assembly 45 and at the other end an eye piece 46. Therange finding unit of the invention, designated generally at 47, isincorporated into the telescope structure just ahead of the eye piece inthe manner shown in detail in FIG. 4. A flanged coupler 46 is threadedinto the housing 44 and mounts an internally threaded collar 5) whichthreads onto a cylindrical housing portion 52 of the range nding unitand thereby couples it to the housing 44. The housing portion 52 isshouldered as indicated at 53 and a ring 54 is slip-fitted on thehousing to abut the shoulder. The space between collar and ring 54 isoccupied by a rotatable cam sleeve 56, the inner surface of which isspirally grooved as shown at 5S. The sleeve 56 is externally shoulderedto receive a manual control assembly comprising a pair of rings 59-69joined in screw thread coupled relation thereon. The ring 64B is knurledto facilitate manual adjustments of the cam ring 56 for purposes to beexplained hereinafter.

In the form of the invention illustrated the main cam member(corresponding to the cam 2t) of FIG. 2) comprises a cam ring 64 whichat one side is formed with two separate inclined cam surfaces 65 and 66and at its other side with a shoulder 67. An internally threadedcoupling ring 68 is formed with a shoulder 69 against one side of whichbears the main cam ring 64. A shouldered retainer ring 7@ in screwthread connection with a knurled control band 72 cooperates to hold theparts in assembly so that manual rotation of the band 72 will cause thecam ring 64 to rotate; these parts being keyed together by the squeezefit provided by the screw assembly of parts 70-72 against the shoulder67 of cam ring 64.

The barrel 52 mounts interiorly thereof a cradle ring 74 which is fixedto the barrel by machine screws as indicated at 76 (FIG. 5). At itsbottom the cradle ring is formed with a flat land to which is fixed byscrews 77 one end of a leaf spring 78 which extends forwardly therefrominto connection at 79 with a reticle frame 8i) mounting a reticle glass81. At its top portion the reticle frame is pivotally suspended from oneend of a bellcrank 62 which is fulcrumed at 83 in a vertically slottedtop portion of the cradle ring 74. The other arm of the bellcrank 82extends through a slotted portion of the barrel 52 into cam followingbearing relation with the cam surface 66 of the cam ring 64. Hence,rotation of the cam 64 will cause the bellcrank 82 to pivot and eitherlift or lower the reticle Within the barrel, according to direction ofrotation of the knurled band 72. The reticle glass carries a reticle asindicated at S5 for aiming at the target impact point after rangefinding adjustments are made as will be explained hereinafter.

The range finding system of the mechanism includes a positionally fixedrange hair or wire 9@ which spans horizontally the bore of the cradlering 74 and is anchored to opposite sides thereof. A first and secondyoke are connected, as fully described below, so as to provide a movablerange hair means. Specifically, in parallel relation to the fixed hairthere is disposed a movable range hair or wire 92 anchored at itsopposite ends to the corresponding ends of a pair of arms 95. The otherends of the arms 95-95 are interconnected by a cross plate 97 wherebythe arms 95-95 and plate 97 form the aforesaid second yoke; such yokebeing fulcr'umed to pivot inside the cradle ring 74 by means of apositionally movable pin 96. Pin 96 extends through a horizontal slot inthe cradle ring 74 into connection with a push-pull arm 93 carrying acam follower pin 99 which rides in the groove 58 of the cam ring 56previously described. Hence it will be understood that manualadjustments of the knurled ring 66 will cause the pivot pin 96 to shiftlongitudinally of the barrel. The arms 95 ofthe second yoke are alsopivotally connected as indicated at 10ft- 160 to corresponding leverarms 102-162 which extend horizontally outside of the cradle ring 74.The arms 102 are interconnected by a yoke piece 164 whereby the arms162-162 and yoke piece 164 form the first yoke and the arms 12-12thereby move in unison, and one arm is slotted to accommodate forvertical as well as horizontal shifting relative to the pin 96. Thefirst yoke comprising the arms 162 and yoke piece 104 is pivoted to thecradle ring 74 as indicated at 166. From the bottom of the yoke piece164 a cam follower pin 108 extends through suitable clearance slots inmembers 78 and 52 into bearing relation against cam surface 65. Atension spring is coupled to the plate 97 of the second yoke and to thecradle ring 74 to bias the movable Wire assembly upwardly and pressuresthe follower 10S against the cam surface 65.

As shown in FIGS. 4, 6, 8, the telescope eye piece barrel as indicatedat 112 is conveniently mounted on the device by a screw threadconnection with the coupling sleeve 66. Hence, it will be understoodthat the mechanism of FIGS. 4-15 is operable in accord with the prin-tciples explained in reference to FIG. 2. The knob 60 is first adjustedso that indicia on portion 59 (FIG. 8) is set for the estimated targetsize, the pivot 96 being displaced thereby longitudinally of the arm 95so as to adjust the mechanism to function appropriately for the verticalsize of the target. Then as the target is viewed through the scope theknob 72 may be rotated to move the movable wire 92 so that the fixed andmovable wires vertically frame the target object. As a result, the camsurface 66 will displace the follower $2 to shift the reticle verticallyso that when it is spotted directly on the target, the gun muzzleelevation has been automatically adjusted for the target distance.

The structure for providing means for modifying the profile of cam 64 tocompensate for trajectories of different ammunition is best shown inFlG. l5. The cam ring 64 is cut through as indicated at 126 to permititto function as explained in connection with FIG. 2. An eccentric camWheel 122 mounted on a shaft 124 is manually rotatable as by a screwdriver slot arrangeY ment 126, and carries an index wheel 128 calibratedfor different types of ammunition; lthe cam 122 correspending to the cammember 42 of FIG. 2. Thus the effect of cam surface 66 on the positionof the reticle may be modified at will in accord with the ballisticchar-- acteristics of the ammunition to be used.

From the foregoing, it will be appreciated that the to be manufacturedrelatively inexpensively by simple shop procedures and easily assembledinto foolproof operative form. The user is thereby provided with atelescopic sight arrangement, the external configuration of whichpresents no substantial dimensional enlargements and undesirableprotuberances. The adjustment control devices are disposed at suchpositions and are operative in such manner as to provide for maximumease of operation and field adjustments of the device.

lt will of course be understood that although only one form of theinvention has been illustrated and described in detail hereinabove,various changes may be made therein without departing from the spirit ofthe invention or the scope of the following claims.

I claim:

l. A combination range finder and gun sight comprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, a cradle ring fixed Within said barrel intermediately of saideye piece and objective lens units, a cantilever spring extending fromsaid cradle ring and supporting a reticle glass for vertical movementsinside said barrel, a cylindrical control knob rotatably mounted uponand encircling said barrel and having separate rst and second camsurfaces, a bellcrank device fulcrumed upon said cradle ring and havingone end extending through a slotted portion of said barrel into camfollowing relation with said first cam surface and connected at itsother end to support said glass whereby rotation of said knob will causesaid glass to move vertically within said barrel, a stationary crosswire horizontally spanning the interior of said barrel and fixed at itsopposite ends to said cradle ring, a first yoke pivotally mounted uponsaid cradle ring and having a cam follower device extending therefrominto bearing relation with said second cam surface, said iirst yokehaving a pair of parallel arms extending longitudinally of said barrel,a second yoke pivotally mounted upon the arms of said first yoke, saidsecond yoke having parallel lever portions extending longitudinally ofsaid barrel and carrying at their front ends a second wire horizontallyspanning the interior of said barrel, said cradle ring and said secondyoke both having slotted portions, a pivot pin disposed within saidslotted portions, a second control knob rotatable about said barrel andhaving a spiral cam surface, a cam follower engaged therewith andcarried by a pushpull link mounting said pivot pin, whereby rotation ofsaid second control knob will displace said pivot pin to vary the pivotconnection position of said secondl yoke relative to said cradle ringand whereby said second wire will be vertically displaced upon rotationof said second control knob.

2. A combination range finder and gun sight comprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, an arc-shaped mount fixed within said barrel intermediately ofsaid eye piece and objective lens units, a cantilever spring extendingfrom said mount and supporting a reticle glass for vertical movementsinside said barrel, a cylindrical control 1knob rotatably mounted uponand encircling said barrel and having separate first and second camsurfaces, a bellcrank device fulcrumed upon said mount and having oneend extending through a slotted portion of said barrel into camfollowing relation with said first cam surface and connected at itsother end to support said glass whereby rotation of said knob will causesaid glass to move vertically within said barrel, a stationary crosswire horizontally spanning the interior of said barrel, opposite ends tosaid mount, a first yoke pivotally mounted upon said mount and having acam follower device extending therefrom into bearing relation with saidsecond cam surface, said first yoke having a pair of parallel armsextending longitudinally of said barrel, a second yoke pivotally mountedupon the arms of said first yoke, said second yoke having parallel leverportions extending longitudinally of said barrel and carrying at theirfront ends a second wire horizontally spanning the interior of saidbarrel, said mount and said second yoke both having slotted portions, apivot pin disposed to extend through both of said slotted portions, asecond control knob rotatable about said barrel and having a spiral camsurface, a cam follower engaged therewith and carried by a pushpull linkmounting said pivot pin, whereby rotation of said second control knobwill displace said pivot pin to vary the pivot connection position ofsaid second yoke relative to said mount and whereby said second wirewill be vertically displaced upon rotation of said second control knob,and means for manually altering the functional setting of said first camsurface.

3. A combination range finder and gun sight comprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, a cradle fixed within said barrel intermediately of said eyepiece and objective lens units, a cantilever spring extending from saidcradle and supporting a reticle glass for vertical movements inside saidbarrel, a cylindrical control knob rotatably mounted upon and encirclingsaid barrel and having separate first and second cam surfaces, abellcrank device fulcrumed upon said' cradle and having one endextending through a slotted portion of said barrel into cam followingrelation with said first cam surface and connected at its other end tosupport said glass whereby rotation of said knob will cause said glassto move vertically within said barrel, a stationary cross wirehorizontally spanning the interior of said barrel and fixed at itsopposite ends to said cradle, a first yoke pivotally mounted upon saidcradle and having a cam follower device extending therefrom into bearingrelation with said second cam surface, said iirst yoke having a pair ofparallel arms extending longitudinally of said barrel, a second yokepivotally mounted upon the arms of said first yoke, said second yokehaving parallel lever portions extending longitudinally of said barreland carrying at their front ends a second wire horizontally spanning theinterior of said barrel, said cradle and said second yoke both havingslotted portions, a pivot pin disposed within said slotted portions, asecond control knob rotatable about said barrel and having a spiral camsurface, a cam follower engaged therewith and carried by a push-pulllink mounting said pivot pin, whereby rotation of said second controlknob will displace said pivot pin to vary the pivot connection positionof said second yoke relative to said cradle and whereby said second wirewill be vertically displaced upon rotation of said second control knob.

4. A combination range finder and gun sight comprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, a cradle fixed within said barrel intermediately of said eyepiece and objective lens units, a cantilever spring extending from saidcradle and supporting a reticle glass for vertical movements inside saidbarrel, a cylindrical control knob rotatably mounted upon and encirclingsaid barrel and having separate first and second cam surfaces, abellcrank device fulcrumed upon said cradle and having one end extendingthrough a slotted portion of said barrel into cam following relationwith said rst cam surface and connected at its other end to support saidglass whereby rotation of said knob will cause said glass to movevertically within said barrel, a stationary cross wire horizontallyspanning the interior of said barrel, a first yoke pivotally mountedupon said cradle and having a cam follower device extending therefrominto bearing relation with said second cam surface, said iirst yokehaving a pair of parallel arms, extending longitudinally of said barrel,a second yoke mounted upon the arms of said iirst yoke, said second yokehaving parallel lever portions extending lonigtudinally of said barreland carrying at their front ends a second wire horizontally spanning theinterior of said barrel, said cradle and said second yoke both havingslotted portions, a pivot pin disposed within said slotted portions, asecond control knob rotatable about said barrel and having a spiral camsurface, a cam follower engaged therewith and carried by a push-pulllink mounting said pivot pin, whereby rotation of said second controlknob will displace said pivot pin to vary the pivot connection positionof said second yoke relative to said cradle and whereby said second wirewill be vertically displaced upon rotation of said second control knob.

5. A combination range finder and gun sight cornprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, a cradle ring fixed within said barrel intermediately of saideye piece and objective lens units, means extending from said cradlering and supporting a reticle glass for vertical movements inside saidbarrel, a control knob rotatably mounted upon said barrel and havingseparate first and second cam surfaces, a bellcrank device fulcrumedupon said cradle ring and having one end extending through a slottedportion of said barrel into cam following relation with said first camsurface and connected at its other end to support said glass wherebyrotation of said knob will cause said glass to move vertically withinsaid barrel, a stationary cross wire horizontally spanning the interiorof said barrel and fixed at its opposite ends to said cradle ring, afirst yoke shaped to conform generally to the inside shape of saidbarrel and pivotally mounted upon said cradle ring and having a camfollower device extending therefrom into bearing relation with saidsecond cam surface, said first yoke having a pair of parallel armsextending longitudinally Within said barrel, a second yoke also shapedto conform generally to the inside wall form of said barrel andpivotally mounted upon the arms of said first yoke, said second yokehaving parallel lever portions extending longitudinally within andagainst opposite sides of said cradle ring and carrying at their frontends a second wire horizontally spanning the interior of said barrel,said cradle ring and said second yoke being both slotted at one side ofthe device, a pivot pin disposed within said slotted portions, a secondcontrol knob rotatable about said barrel and having a spiral camsurface, a cam follower engaged therewith and carried by a push-pulllink mounting said pivot pin, whereby rotation of said second controlknob will displace said pivot pin to vary the pivot connection positionof said second yoke relative to said cradle ring and whereby said secondwire will be vertically displaced upon rotation of said second controlknob.

6. A combination range finder and gun sight comprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, a cradle ring fixed within said barrel intermediately of saideye piece and objective lens units, means extending from said cradlering and supporting a reticle glass forvertical movements inside saidbarrel, a control knob rotatably mounted upon said barrel and havingseparate first and second cam surfaces, a bellcrank device fulcrumedupon said cradle ringiand having one end extending through a slottedportion of said barrel into cam following relation with said first camsurface and connected at its other end to support said glass wherebyrotation of said knob will cause said glass to move vertically withinsaid barrel, a stationary cross wire horizontally spanning the interiorof said barrel and fixed at its opposite ends to said cradle ring, afirst yoke pivotally mounted upon said cradle ring and having a camfollower device extending therefrom into bearing relation with saidsecond cam surface, said first yoke having arm means extendinglongitudinally within said barrel, a second yoke pivotally mounted uponthe arm means of said first yoke, said second yoke haivng lever meansextending longitudinally within said cradle ring and carrying at thefront end thereof a second wire horizontally spanning the interior ofsaid barrel, said cradle Vring and said second yoke being both slottedat one side of the device, a pivot pin disposed within said slottedportions, a second control knob rotatable about said barrel and having aspiral cam surface, a cam follower engaged therewith and carried by apush-pull link mounting said pivot pin, whereby rotation of said secondcontrol knob will displace said pivot pin to vary the pivot connectionposition of said second yoke relative to said cradle ring and wherebysaid second wire will be vertically displaced upon rota-` tion of saidsecond control knob.

7. A combination range finder and gun sight comprising, a telescopebarrel having eye piece and objective lens components at opposite endsthereof, a cradle ring fixed within said barrel intermediately of saideye piece and objective lens units, means extending from said cradlering and supporting a reticle glass for vertical movements inside saidbarrel, a control knob rotatably mounted upon said barrel and havingseparate first and second cam surfaces, a bellcrank device fulcrumedupon said cradle ring and having one end extending through a slottedportion of said barrel into cam following relation with said first camsurface and connected at its other end to support said glass wherebyrotation of said knob will cause said glass to move vertically withinsaid barrel, a stationary cross wire horizontally spanning the interiorof said barrel and xe'd at its opposite ends to said cradle ring, afirst yoke shaped to conform generally to the inside shape of saidbarrel and pivotally mounted upon said cradle ring and having a camfollower device extending therefrom into bearingrelation with saidsecond cam surface, said first yoke having a pair of parallel armsextending longitudinally within said barrel, a second yoke also shapedto conform generally to the inside wall form of said barrel andpivotally mounted upon the arms of said first yoke, said second yokehaving parallel lever portions extending longitudinally within andagainst opposite sides of said cradle ring and carying at their frontends a second wire horizontally spanning the interior of said barrel,said cradle ring and said second yoke being both slotted at one side ofthe device, a pivotpin disposed within said slotted portions, a secondcontrol knob rotatable about said barrel and having a spiral camsurface, a cam follower engaged therewith and carried by a push-pulllink mounting said pivot pin, whereby rotation of said second controlknob will displace said pivot pin to vary the pivot connection positionof said second yoke relative to said cradle ring and whereby said secondwire will be, vertically displaced upon rotation of said secondl controlknob, and means for manually altering said first cam surface.

8. A combination gun sight and range finder including a telescopehousing to be aflixed to a gun, a first range finder reference markfixedly mounted within said telescope housing, linkage means mountedwithin said housing, a second range finder reference mark carried bysaid linkage means, an actuator for said linkage disposed outside saidhousing, a movable aim point reticle mounted in said housing and movablein response to operation of said actuator, a first settable means foraltering the action of said linkage to vary the rate of movement of saidsecond range finder reference mark in response to movement of saidactuator, and a second settable means for altering travel of said aimpoint reticle relative to said housing responsive to said actuator.

9. A combination gun sight and range finder including a cylindricaltelescope housing to be axed to a gun, a first range finder referencemark fixedly mounted within said telescope housing, linkage meansmounted within said housing, a second range finder reference markcarried by said linkage means, a circular actuator dial for said linkagemounted on the outside of and encircling said housing, a movable aimpiont reticle mounted in said housing and movable in response tooperation of said actuator dial, a first settable means for altering theaction of said linkage to Vary the rate of movement of said second rangefinder reference mark in response to movement of said actuator if? dial,and a second settable means for altering the travel of said aim pointreticle relative to said housing responsive to said actuator.

l0. A combination gun sight and ra e nder including a cylindricaltelescope housing to be ailixed to a gun, a :iirst range finderreference mark rixedly mounted within said telescope housing, linkagemeans mounted wir" in said housing, a second range finder reference markcarried by said linkage means, a circular actuator dial for said linkagemounted on the outside or" and encircling said housing, a movable aimpoint reticle mounted housing and movable in response to operation ofsaid actuator l, a rst settable means for alt ring the action of saidlinkage to vary the rate of movemen of said second range nder referencemark in response to movement of said actuator dial, said first settablemeans comprising a circular dial mounted for rotation on the outside ofand encircling said housing, and a second settable means for alteringthe travel of said aim point reticle relative to said housing responsiveto said actuator.

1l. A combination gun sight and range inder including a cylindricaltelescope housing to be aiixed to a gun, a rst range finder referencemark iredly mounted within said telescope housing, linkage means mountedwithin said housing, a second range nder reference mark carried by saidlinkage means, a circular actuator cam for said linkage mounted on theoutside of and encircling said housing, a movable aim point reticlemounted in said housing and movable in response to operation o saidactuator cam, a first settable means for altering the action of saidlinkage to vary the rate of movement o said second range i'inderreference mark in response to movement of said actuator cam, said rstsettable means comprising a circular cam mounted for rotation on theoutside of and encircling said housing, and a second settable means foraltering the travel of said aim point reticle relative to said housingresponsive to said actuator.

12. A combination gun sight and range finder including a cylindricaltelescope housing to be aiiixed to a gun, a rst range finder referencemark iixedly mounted within said telescope housing, linkage meansmounted within said housing, a second range finder reference mak carriedby said linkage means, a circular actuator cam for said linkage mountedfor rotation on the outside of and encircling said housing, a movableaim point reticle mounted in said housing and movable in response toOperation of said actuator cam, a irst settable means for altering theaction of said linkage to vary the rate of movement of said second rangender reference mark in response to movement of said actuator cam, saidrst settable means comprising a circular cam mounted for rotation on theoutside O' and encircling said housing, and a second settable means foraltering the operating eiect of said actuator cam.

13. A combination gun sight and range finder including a cylindricaltelescope housing to be aixed to a gun, a iirst range nder referencemark xedly mounted within said telescope housing, linkage means mountedwithin said housing, a second range finder reference mark carried bysaid linkage means, a circular actuator for said linkage mounted on theoutside of and encircling said housing, a movable aim point reticlemounted in said housing and movable in response to operation of saidactuator cam, a rst settable means for altering the action of saidlinkage to vary the rate of movement of said second range finderreference mark in response to movement of said actuator cam, and asecond settable means for altering the travel of said aim point reticlerelative to said housing responsive to said actuator, said secondsettable means being calibrated to match the action of said linkage tothe ballistic characteristics of ammunition used said gun.

14. ln a combination gun sight and rance finder, iirst second referencemarks for framing a target therebetween, an aim point reticle, means forsimultaneously (a) varying the framing space between said referencemarks and b) moving said aim point reticle within such space, and meansfor independently varying the rate of movement of said aim point reticlerelative to the rate of movement between said reference marks.

15. ln the gun sight according to claim i4 including means forindependently varying the rate of movement between said reference marksrelative to the rate of movement of said aim point reticie.

16. ln a combination gun sigdt and range finder, irst and secondreference marks for framing a target therebetween, an aim point reticle,means for simultaneously (rz) varying the framing space between saidreference marks and (b) moving said aim point reticle within such space,and means for independently varying the rate of movement between saidreference marks relative to the rate of movement of said aim pointreticle.

17. A combination sight and range nder comprising a tubular housing forthe optical cor iponents of the system, reticle means disposed withinsaid housing, said reticle means consisting of a fixed reference mark, amovable reference mark and an aim point mark, annular actuator camencircling said housing and having a pair of circumferentially spacedcam surfaces thereon, means engaged with one of said cam surfaces andconnected with said movable reference mark and means engaged with theother of stid cam surfaces and connected with said aim point markwhereby both of the movable portions of the reticle means are responsiveto actuation by said actuator cam, said means connected with saidmovable reference mark being a linkage system, an annular cam sleeveencircling said housing, and means engafed with said cam sleeve forminga movable fulcrum for said linkage system.

18. The assembly as defined in claim 17 wherein the portion of saidactuator cam forming said other cam surface is movable relative to saidone cam surface to vary the camming effect of such other cam surface,

19. A combination gun sight and range finder cornprising a tubularhousing for the optical components of the system, reticle means disposedwithin siad housing, said reticle means consisting of a fixed referencemark, a movable reference mark and an aim point mark, an annularactuator cam encircling said housing and having a pair ofcircumferentially spaced cam surfaces thereon, means engaged with one ofsaid cam surfaces and connected with said movable reference mark andmeans engaged with the other of said cam surfaces and connected withsaid aim point mark whereby both of the movable portions of the reticlemeans are responsive to actuation by said actuator cam, the portion osaid actuator cam forming said other cam surface being movable relativeto said one cam surface to vary the camming eriect ot such other camsurface.

Leupold `lan. 23, 1951 Braker Nov. 5, 1957 UNITED STATES PATENT oEEICECERTIFICATE OE CORRECTION Patent No. 3, 123,915 March lO, 1964 LeonardA., Wilkinson It is hereby certified that error appears in the abovenumbered patent requiring correction and that the said Letters Patentshould read as corrected below.

Column 4, line 18, before "pin" insert pivot column l6, line 69, before"mounted" insert pivotally column 8, line 62, before "travel" insert thecolumn 9, line 14, for "movemen" read ,movement column lO, line 47, for*"siad" read -i said l (SEAL) Signed and sealed this 7th day of July1964, i Attest: 1

yTEST w; `swTDEE EDWARD J. BRENNER ,meeting Officer Commissioner ofPatents

14. IN A COMBINATION GUN SIGHT AND RANGE FINDER, FIRST AND SECONDREFERENCE MARKS FOR "FRAMING" A TARGET THEREBETWEEN, AN AIM POINTRETICLE, MEANS FOR SIMULTANEOUSLY (A) VARYING THE "FRAMING" SPACEBETWEEN SAID REFERENCE MARKS AND (B) MOVING SAID AIM POINT RETICLEWITHIN SUCH SPACE, AND MEANS FOR INDEPENDENTLY VARYING THE RATE OFMOVEMENT OF SAID AIM POINT RETICLE RELATIVE TO THE RATE OF MOVEMENTBETWEEN SAID REFERENCE MARKS.